Technical SEO refers to the process of optimizing a website's infrastructure to improve its visibility in search engine results. This includes ensuring that the site is easily crawlable by search engine bots, has a fast loading speed, and is mobile-friendly. Key elements of technical SEO include proper use of XML sitemaps, robots.txt files, and structured data. Another important aspect of technical SEO is ensuring that the website is secure, typically through the use of HTTPS. Additionally, fixing broken links and optimizing site architecture can enhance user experience and help search engines index the site more effectively. Overall, technical SEO lays the foundation for successful online visibility.